From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: Alistair Popple <alistair@popple.id.au>
Cc: devicetree@vger.kernel.org,
Alistair Popple <alistair@popple.id.au>,
mhairgrove@nvidia.com, linux-kernel@vger.kernel.org,
linuxppc-dev@ozlabs.org, robh+dt@kernel.org,
shailendras@nvidia.com
Subject: Re: [v2, 3/3] powerpc/powernv: Introduce address translation services for Nvlink2
Date: Thu, 6 Apr 2017 23:06:08 +1000 (AEST) [thread overview]
Message-ID: <3vzNJ01sS5z9s8N@ozlabs.org> (raw)
In-Reply-To: <1491213104-24450-3-git-send-email-alistair@popple.id.au>
On Mon, 2017-04-03 at 09:51:44 UTC, Alistair Popple wrote:
> Nvlink2 supports address translation services (ATS) allowing devices
> to request address translations from an mmu known as the nest MMU
> which is setup to walk the CPU page tables.
>
> To access this functionality certain firmware calls are required to
> setup and manage hardware context tables in the nvlink processing unit
> (NPU). The NPU also manages forwarding of TLB invalidates (known as
> address translation shootdowns/ATSDs) to attached devices.
>
> This patch exports several methods to allow device drivers to register
> a process id (PASID/PID) in the hardware tables and to receive
> notification of when a device should stop issuing address translation
> requests (ATRs). It also adds a fault handler to allow device drivers
> to demand fault pages in.
>
> Signed-off-by: Alistair Popple <alistair@popple.id.au>
Applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/1ab66d1fbadad86b1f4a9c7857e193
cheers
next prev parent reply other threads:[~2017-04-06 13:06 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-03 9:51 [PATCH v2 1/3] drivers/of/base.c: Add of_property_read_u64_index Alistair Popple
2017-04-03 9:51 ` [PATCH v2 2/3] powerpc/powernv: Add sanity checks to pnv_pci_get_{gpu|npu}_dev Alistair Popple
2017-04-06 13:06 ` [v2, " Michael Ellerman
2017-04-03 9:51 ` [PATCH v2 3/3] powerpc/powernv: Introduce address translation services for Nvlink2 Alistair Popple
2017-04-06 13:06 ` Michael Ellerman [this message]
2017-04-06 13:06 ` [v2,1/3] drivers/of/base.c: Add of_property_read_u64_index Michael Ellerman
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